Shutter for cameras.



F. W. HOCHSTETTER.

SHUTTER FOR CAMERAS.

APPLICATION FILED JUNE 20. 1913.

Patented June 20, 1916.

. M @mamxmumiwm. $19135 arro wimwm Q a ga/,4, c, am

UNITED STATES PATENT OFFICE FREDERICK W. HOGHSTETTER, OF NEW YORK, N.Y., ASSIGNOR TO H. P. PATENTS AND- PROCESSES COMPANY, INC., ACORPORATION OF NEW YORK.

SHUTTER FOR CAMERAS.

T all whom it may concern:

Be it known that I, vFREDERICK W. HOOH- STETTER, a subject of theEmperor of Gering is a full, clear, and exact specification.

' invention being more fully described here- This invention relates to aclass of devices adapted to be used in conjunction with cameras.

My invention has for its object primarily to provide a device or shutterdesigned to be applied especially to forms of cameras used for producingmoving picture films whereby the sensitized film may be consecutivelyexposed to the rays of light focused thereon through the medium of oneor more lenses employed for photographing scenes, or various objects,made wherein is employed an opaque plate which is intermittently guidedbefore the exposure window of the camera to cut-off the light atsuccessive inter vals upon the film as it is transmitted through thecamera.

Another object of the invention is to provide mechanism serving toimpart a rec1p rocatory movement to the opaque shutter from the driveshaft of the camera whereby the intermittent shutting-0E of the light bythe shutter will conform with the regular operation of other parts ofthecamera.

A further object of the invention is to provide a shutter which issusceptible of being made in various-sizes and shapes so as tobe adaptedfor usein conjunction with cameras of different types.

A practical embodiment of the invention is represented in theaccompanying drawing forming a part of this specification in whichsimilar characters of reference indicate corresponding parts in all theviews, the said inafter, and then pointed out in the appended claims.

In the drawing, Figure 1, is a fragmentary section, partly in detail,taken. vertically through the front of a camera, with one form of myshutter applied thereto. Fig. 2 is a fragmentary view of the front Plateof the camera, showing an elevation of the shutter as taken on the lineII-II of Fig. 1, and Fig. 3 is a fragmentary view partly in detail andpartly in section, looking down Specification of Letters Patent.Patented June 20 1916.

Application filed June 20, 1913. Serial No. 774,866.

upon the part of the camera and the shutter shown in Fig. 1.

The device, or shutter has a guide plate, or frame 10 adapted to besecured by screws, pr otherwise to the front wall 11 of the easmg of acamera having an exposure window 12, a drive shaft 13 which is'driven bya crank handle 14, and a framing device, as 15, of any suitable formadapted to guide a sensitized film 16 to a sprocket drum, as 17,

which receives its rotation from the drive shaft ,through the medium ofgears 18 and 19. v

The guide plate, or frame 10 of the shutter is preferably substantiallyrectangular in shape, and a greater portion of the central part thereofis struck outwardly, as at 20, so as to extend from the front wall 11 ofthe camera whereby a recess 21 is provided between said front wall andthe extending portion 20 of the guide frame. Through the upper part ofthe extending portion 20 of the guide frame is a window 22 which is inregister with the exposure window 12 of the front wall of the casing ofthe camera, and in the lower part of said extending por tion is anopening 23.

Adapted to be reciprocated in the recess 21 of the guide frame is aplate, or shutter 24 which is made of any suitable opaque material, andsaid shutter is of a length to extend approximately from the lower edgerocated.

To a pin 25 provided in proximityto the lower part of the shutter 23 isrevolubly held the yoke, or slotted end of a lever, or crank arm 26 of amechanism 27 adapted to impart a reciprocatory movement to the shutterwhen the drive shaft of the camera is driven, and serving toyieldinglyforce the shutter toward the guide frame is aspring 27. The opposite endof the crank arm 26 is pivoted 'ecce'ntrically to a disk 28 held upon astud, or short shaft 29 which is journaled in the front wall 11 of thecasing of the camera. Also upon the stud 29 is a bevel gear 30 whichisin mesh with a bevel gear 31 held upon the drive shaft, 13 of thecamera. Thus when the crank handle 14 is turned for operating the camerathe shutter off the exposures 24 will he reciprocated in the recess 21of the guide frame 10 for intermittently cuttingof the light upon thesensitized film which is projected therefrom through the medium of one,or more lenses, as 32 and 33, provided in an adjustable barrel, as 34,of the usual form as is customary when photographing scenes, or otherobjects to produce moving picture films.

In the foregoing description, I have embodied the preferred form of myinvention, but I do not wish to be understood as limiting myselfthereto, as I am aware that modifications may be made therein withoutdeparting from the pri ciple or sacrificing any of the advantages ofthis invention, therefore I reserve to myself the right to make suchchanges as fairly fall within the scope of the appended claims.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 7 1. In a shutter mechanism for cameras, thecombination with the front Wall of a camera having an exposure window,an objective in front of said window, and means for moving a sensitizedfilm by the opening for exposure to the rays-of light focused thereon;of a guide frame secured to the I rent wall and having anofi'set centralpart spaced from said front wall to provide a recess therebetween, saidframe having a window alining with said exposure window, said framerecess being closed at one end and open at the other end, a plateslidable in the recess of said guide frame and means operativelyconnected to the'film moving means for reciprocating the platetherewith.

2. In ashutter mechanism for cameras, the combination with the frontwall of a camera having an exposure window, an objective in front ofsaid window and means for mov- 7 ing a sensitized film by the openingfor exposure to the rays of light focused thereon;

the windows,

secured to the front wall and having an offset central part spaced fromsaid front wall to provide a recess therebetween, said frame having awindow alining with said exposure window, said frame recess being closedat its top and open at its bottom, a shutter plate mounted in the recessfor movement to cover and uncover spring means between the plate forforcing the latter outward against the frame, and a crank con nectionbetween the plate and film moving means for intermittently cuttin ofithe exposures of the light upon the 1m and exposing the same.

3. n a shutter mechanism for cameras for producing moving icture films,the combination with the f i'ont wall of a camera having an exposurewindow, a. framing device in rear of said window, and a film movingmeans comprisingin part a hand operated film engaging drum; of a guideframe in front ofsaid window and having a recess, a plate mounted insaid recess, said frame having a window in front of said exposure Windowand an opening spaced therebe neath, an objective in front of saidwindow on the frame, said shutter being adapted to uncover said Windowswhen lowered, a stud of a. guide frame front wall and geared to the filmmoving means and hav-- ing a crank disk, a crank rod having slottcdconnection with the plate and eceentrlcally connected to the diskwhereby operation of the film moving means will cause reciprocation ofthe plate, and a spring carried by the front wall and pressing outwardagainst the plate to hold the latter against the outer portion of theframe.

This specification s1 ed and witnessed this nineteenth day of une A. D.1913.

FREDERICK W. HOGHSTETTER.

Witnesses:

Roar. B. ABBQTI, M. DERMODY.

